"The treatment involved infusions of bicarbonate of soda," Judge Fleur Kingham said in a written decision published last week.

"Dr O'Sullivan concedes there is no reasonable scientific evidence to support the treatment, nor a reasonable scientific expectation that it would have resulted in a favourable outcome for Ms Newlands.

"She also concedes that she did not appropriately investigate Ms Newland's condition; nor did she advise her of her conventional treatment options and their associated risks."

Dr O'Sullivan told the tribunal Ms Newlands had a "forceful personality" and did not seek advice, merely assistance.

"It was Dr O'Sullivan's responsibility to ensure that her patient was properly advised, regardless of how informed and resolute she appeared to be," Judge Kingham said.

Judge Kingham said it was more concerning that after the initial experience with Ms Newlands, Dr O'Sullivan became drawn in to "improperly enabling" the naturopath's treatment of others.

Dr O'Sullivan gave Ms Newlands permission in 2008 to use her account number to order medical supplies from a health care supplier, allowing her access to restricted and controlled drugs.

Dr O'Sullivan used unconventional treatments on two of Ms Newland's clients, who were seriously ill with cancer.